How to Care for a Classic Red Caladium

Water caladiums as needed to keep the soil consistently moist. Don't allow the soil to become bone dry because the plants may wilt, drop leaves and eventually die. Similarly, never water to the point that the soil is soggy because the tubers may rot. Although water requirements vary depending on climate, soil type and exposure to sunlight, a droopy plant is a sign that the plant needs water.

Spread 1 to 2 inches of mulch around the plants to conserve moisture and keep the soil moist. Use an organic mulch such as pine needles or chopped bark.

Feed caladiums a granular 8-8-8 or 10-10-10 fertilizer once every month during the spring and summer. Apply the fertilizer at a rate of 1 pound per 100 square feet of planting space or 1 teaspoon per 1 square foot.

Spray the plants with insecticidal soap spray if you notice pests such as aphids and thrips. Apply the spray at a rate of 2 teaspoons to 2 1/2 tablespoons per quart of water, depending on the severity of the infestation. Reapply the spray every four to seven days until the pests are gone.

Dig caladium by lifting the tubers from the ground with a garden fork before the first frost if you live in a growing zone north of USDA zone 8. Remove the excess soil, then place the tubers in a warm, dry location for seven to 10 days. Remove the dry leaves and store the tubers in a cardboard box filled with peat moss where temperatures remain between 60 and 60 degrees Fahrenheit. Replant the tubers when all danger of frost has passed in the spring.